2) The pH of a sample of blood is 7.4, while gastric juice is pH 1.4. The blood sample has: A) 5.29 times lower [H ] than the gastric juice. B) 6 times lower [H ] than the gastric juice. C) 6000 times lower [H ] than the gastric juice. D) one million times lower [H ] than the gastric juice.

The blood sample has: D) one million times lower [H⁺] than the gastric juice.

Explanation:

Step 1: Calculate the concentration of H⁺ in blood

We will use the definition of pH.

pH = -log [H⁺]

[H⁺] = antilog - pH = antilog - 7.4 = 4.0 × 10⁻⁸ M

Step 2: Calculate the concentration of H⁺ in gastric juice

We will use the definition of pH.

pH = -log [H⁺]

[H⁺] = antilog - pH = antilog - 1.4 = 0.040 M

Step 3: Calculate the ratio [H⁺]gastric juice/[H⁺] blood

[H⁺]gastric juice/[H⁺] blood = 0.040 M/4.0 × 10⁻⁸ M = 1,000,000

the law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products. because atoms are only rearranged in a chemical reaction, there must be the same number of sodium atoms and chlorine atoms in both the reactants and products

in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm